Design of 4 Line Private Exchange Box

Design of 4 Line Private Exchange Box INTRODUCTION 1.0 INTRODUCTION Private branch exchange system (PBXs) operates as a connection within private organizations usually a business. Because they incorporate telephones, the general term extension is used to refer to any end point on the branch. The PBX handles calls between these extensions. The primary advantage of PBXs was cost savings on internal phone calls: handling the circuit switching locally reduced charges for local phone services. The private branch exchange (PBX) provides internal station-to-station communications for a well-defined set of users. Three distinct generations of private branch exchanges have appeared. In the first generation (1900-1930), a human operator manually set up calls. Second-generation private branch exchanges (mid-1930s to mid-1970s) used mechanical relays to establish the call path. The third generation of private branch exchanges is the stored-program microprocessor-controlled system. Introduced in the mid-1970s, these systems use computer instructions to perform th e call set-up and tear-down. The third-generation private branch exchange is physically much smaller than electromechanical models, uses less power, and generates less heat.(Brooks, 1999) In this project, the design of a 4 line telephone systems with full signaling and switching functions similar to those of the central office systems was embarked upon. Dial tone, busy tone, and ring tone are provided during call process. Switching employs integrated circuit (IC) matrix switches on four buses. Thus, this system is expandable to 8 lines (4 pairs) if more hardware is added. This system is switching on the Dual Tone Multi Frequency (DTMF) dialing signal. 1.1 STATEMENT OF PROBLEM The major problems this project intends to deal with are: Cut down cost of internal calls made within a company. Eliminate the need for a central telephone company to help you monitor your internal calls. Eliminate Stress of notification of telephone company each time you need a new extension and thereby reducing cost. Ensure security of your internal calls which otherwise can be tapped by company operating it. Eliminate the need for a manual switchboard and subsequently an operator to connect the calls. Reduce man-hours lost through staff walking about in an office in order to pass information to each other. 1.2 AIMS AND OBJECTIVES: The main aim of this project is to design and implement a 4 line private exchange box that is able to create connection between four different telephone lines internally without having to connect to an external or trunk line. The objectives include: Establishing connections between the telephone sets of any two users. (e.g. mapping a dialed number to a physical phone) Maintaining such connections as long as the users require them. (i.e. channeling voice signals between the users) Creating an easy means of communication in an office without getting to spend money for their internal calls. To switch between telephone users thereby creating connections. To make sure the connection remains in place as long as it last, by keeping its resources. To properly end the connection when a user hangs up. 1.3 SIGNIFICANCE OF STUDY The ability or concept of providing an easy and less expensive way of communication within a small office or organization without having to pay for your internal calls or having limits to the rate or length of calls within the office. Also it is not necessary to go from office to office when something is needed, information is to be passed; a call to a colleague saves stress of walking about. 1.4 SCOPE OF STUDY The Private Exchange System in this project is limited to a four lines which means that internal calls can be made from only four nodes. As such, it is only suitable for very small organization. 1.5 RESEARCH METHODOLOGY The review of existing and related works to source appropriate information on how to go about the implementation of the project will be carried out. Information shall be gathered from text books, magazines, journals, and World Wide Web to provide answers in relation to the study. Based on the review, the design and implementation of a four line private exchange box system shall be carried out. 1.6 LIMITATIONS OF STUDY There are several factors that could contribute to the group not delving deeper into this project which could have resulted in a more comprehensive work. Constraints are unavoidable in any system, be it a natural system or a computer system. Due to the extensiveness of this project topic, limitations were encountered some of which include: Time constraint. Financial constraints. Inadequate facilities to work with. 1.7 ORGANIZATION OF WORK In chapter one, the research topic is introduced, which is followed by the statement of problem after which the aims and objectives of the study are stated, significance of study, scope of study and research methodology are all identified. The second chapter gives us a view of the related works which have been done and how they are related to our work. The third chapter is about our design methodology and this emphasizes on how the whole private exchange system works and its components. The quality of the system is tested and documented in chapter four. Also in chapter four, an in-depth manual of the system functions and contents is given. A summary of all chapters, a conclusion is outlined in chapter five. CHAPTER TWO LITERATURE REVIEW 2.0 HISTORY OF PRIVATE EXCHANGE BOX In the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls. A central office is the physical building used to house inside plant equipment including telephone switches, which make phone calls work in the sense of making connections and relaying the speech information. Early telephone exchanges are a suitable example of circuit switching; the subscriber would ask the operator to connect to another subscriber, whether on the same exchange or via an inter-exchange link and another operator. In any case, the end result was a physical electrical connection between the two subscribers telephones for the duration of the call. The copper wire used for the connection could not be used to carry other calls at the same time, even if the subscribers were in fact not talking and the line was silent. The first telephone exchange opened in New Haven, Connecticut in 1878. The switchboard was built from carriage bolts, handles from tea pot lids and bustle wire and could handle two simultaneous conversations. Later exchanges consisted of one to several hundred plug boards staffed by telephone operators. Each operator sat in front of a vertical panel containing banks of  ¼-inch tip-ring-sleeve (3-conductor) jacks, each of which was the local termination of a subscribers telephone line. In front of the jack panel lay a horizontal panel containing two rows of patch cords, each pair connected to a cord circuit. When a calling party lifted the receiver, a signal lamp near the jack would light. The operator would plug one of the cords (the answering cord) into the subscribers jack and switch her headset into the circuit to ask, number please? Depending upon the answer, the operator might plug the other cord of the pair (the ringing cord) into the called partys local jack and start the ri nging cycle, or plug into a trunk circuit to start what might be a long distance call handled by subsequent operators in another bank of boards or in another building miles away. 2.1 PBX SYSTEM COMPONENTS PBX is a telephone exchange serving a single organization and having no means for connecting to a public telephone system it serves a user company which wants to have its own communication branch to save some money on internal calls. This is done by having the exchanging or switching of circuits done locally, inside the company. There are some important components which play a major role in the implementation of an effective PBX system. Some of the Component The PBXs internal switching network. Central processor unit (CPU) or computer inside the system, including memory. Logic cards, switching and control cards, power cards and related devices that facilitate PBX operation. Stations or telephone sets, sometimes called lines. Outside Telco trunks that deliver signals to (and carry them from) the PBX. Console or switchboard allows the operator to control incoming calls. Uninterruptible Power Supply (UPS) consisting of sensors, power switches and batteries. Interconnecting wiring. Cabinets, closets, vaults and other housings. 2.2 PRIVATE BRANCH EXCHANGE (PBX) There are essentially three different types of PBXs that could be deployed within an organization infrastructure. It is necessary to be certain of type in use, so as to be able to identify the essential numbers. There are currently three different PBX classes: Centrex; Direct Inward Dialing (DID)/Direct Outward Dialing (DOD) and Megalink. 2.2.1 CENTREX Centrex is the easiest of the PBX types. This PBX, unlike other types is installed within the telephone companys Central Office (CO) and does not require dialing an extension code (normally 4 numeric characters) after having dialed the 7 to 10 digit number to connect a call to an individual. In a simplistic manner, it could be considered similar to the telephone used at home. It has an area code (NPA), an Exchange (NXX) and a Unique Number, (0000 to 9999) and does not require the dialling of another number after it in order to place a call. These numbers may be entered through a PAD. 2.2.2 Direct Inward Dialing(DID)/ Direct Outward Dialing (DOD) Unlike a Centrex, these types of PBXs is not installed within the telephone companys Central Office. Secondly, if a cut of the telephone wire occurs outside the building, individuals are still able to dial within it to talk to colleagues by simply dialing their extension number (normally a number between 0000 to 9999) lastly; this PBX is controlled via a computer interface at a control console. Since the PBX requires constant power to function, it may be necessary to hook it with generating plant, in the absence of power from electricity company. Direct Inward Dialing (DID) and Direct Outward Dialing (DOD) are simply features of an Automated PBX which require that you dial the companys general telephone number followed by the entry of the individuals extension number when prompted to do so. DIDs allow you direct dialing (seven digits) to locate an individual within an organizations PBX. It is a trunk phone number that must be entered into the PAD program and flagged as a PBX to ensure that the outgoing line(s) get priority. PBXs may be privately owned or telecommunication company owned. If PBX is programmable it is possible to assign specific trunk lines to specific numbers. These trunk line numbers may then be entered on PAD thus providing dial tone protection. 2.2.3 MEGALINKS The major difference between this and a Centrex PBX is that the exiting trunk lines from a building to the telephone company central office are comprised of fibre optic cables and not through twisted pair wiring. Another difference is that unlike a Centrex that is identified by its ten digit telephone number (NPA, NXX, and Unique), Megalinks are identified by a circuit ID number. This number may contain characters and may even resemble a telephone number, however, PAD does not allow for the entry of the circuit switch identifier. The reason is quite simple, fibre optic cabling circuits can handle far more traffic than twisted pair PBXs. 2.3 INTERFACE STANDARDS Interfaces for connecting extensions to a PBX include: POTS (Plain Old Telephone System) the common two-wire interface used in most homes. This is cheap and effective, and allows almost any standard phone to be used as an extension. Proprietary the manufacturer has defined a protocol. One can only connect the manufacturers sets to their PBX, but the benefit is more visible information displayed and/or specific function buttons. DECT a standard for connecting cordless phones. Internet Protocol For example, H.323 and SIP. Interfaces for connecting PBXs to each other include: Proprietary protocols if equipment from several manufacturers is on site, the use of a standard protocol is required. QSIG for connecting PBXs to each other, usually runs over T1 (T-carrier) or E1 (E-carrier) physical circuits. DPNSS for connecting PBXs to trunk lines. Standardised by British Telecom, this usually runs over E1 (E-carrier) physical circuits. Internet Protocol H.323, SIP and IAX protocols are IP based solutions which can handle voice and multimedia (e.g. video) calls. Interfaces for connecting PBXs to trunk lines include: Standard POTS (Plain Old Telephone System) lines the common two-wire interface used in most domestic homes. This is adequate only for smaller systems, and can suffer from not being able to detect incoming calls when trying to make an outbound call. ISDN the most common digital standard for fixed telephony devices. This can be supplied in either Basic (2 circuit capacity) or Primary (24 or 30 circuit capacity) versions. Most medium to large companies would use Primary ISDN circuits carried on T1 or E1 physical connections. RBS (Robbed bit signaling) delivers 24 digital circuits over a four-wire (T1) interface. Internet Protocol H.323, SIP, MGCP, and Inter-Asterisk eXchange protocols operate over IP and are supported by some network providers. Interfaces for collecting data from the PBX: Serial interface historically used to print every call record to a serial printer. Now an application connects via serial cable to this port. Network Port (Listen mode) where an external application connects to the TCP or UDP port. The PBX then starts streaming information down to the application. Network Port (Server mode) The PBX connects to another application or buffer. File The PBX generates a file containing the call records from the PBX. The call records from the PBX are called SMDR, CDR, or CIL.   (Micheal, 1999) 2.4 TELEPHONE Telephone is one of the most amazing devices ever created.   Although most people take it completely for granted, the telephone is one of the most amazing devices ever created. To talk to someone, just pick up the phone and dial a few digits; connection will be established with the person and a two-way conversation can take place. It is an instrument designed for simultaneous transmission and reception of the human voice. It works by converting the sound waves of the human voice to pulses of electrical current, transmitting the current, and then retranslating the current back to sound. The U.S. patent granted to Alexander Graham Bell in 1876 for developing a device to transmit speech sounds over electric wires is often called the most valuable ever issued. Within 20 years, the telephone acquired a form that has remained fundamentally unchanged for more than a century. The advent of the transistor (1947) led to lightweight, compact circuitry . Advances in electronics have allowed th e introduction of a number of smart features such as automatic redialing, caller identification, call waiting, and call forwarding. The figure 2.1 shows the major components that makes up a telephone set. 2.5 HOW TELEPHONE WORKS When a person speaks into a telephone, the sound waves created by his voice enter the mouthpiece. An electric current carries the sound to the telephone of the person he is talking to. A telephone has two main parts: (1) the transmitter and (2) the receiver.The Transmitter of a telephone serves as a sensitive electric ear. It lies behind the mouthpiece of the phone. Like the human ear, the transmitter has 14 eardrum. The eardrum of the telephone is a thin, round metal disk called a diaphragm. When a person talks into the telephone, the sound waves strike the diaphragm and make it vibrate. The diaphragm vibrates at various speeds, depending on the variations in air pressure caused by the varying tones of the speakers voice.   Behind the diaphragm lies a small cup filled with tiny grains of carbon. The diaphragm presses against these carbon grains. Low voltage electric current travels through the grains. This current comes from batteries at the telephone company. The pressure on the carbon grains varies as sound waves make the diaphragm vibrate. A loud sound causes the sound waves to push hard on the diaphragm. In turn, the diaphragm presses the grains tightly together. This action makes it easier for the electric current to travel through, and a large amount of electricity flows through the grains. When the sound is soft, the sound waves push lightly on the diaphragm. In turn, the diaphragm puts only a light pressure on the carbon grains. The grains are pressed together loosely. This makes it harder for the electric current to pass through them, and less current flows through the grains. Thus, the pattern of the sound waves determines the pressure on the diaphragm. This pressure, in turn, regulates the pressure on the carbon grains. The crowded or loose grains cause the electric current to become stronger or weaker. The current copies the pattern of the sound waves and travels over a telephone wire to the receiver of another telephone. The Receiver serves as an electric mouth. Like a human voice, it has vocal cords. The vocal cords of the receiver are a diaphragm. Two magnets located at the edge of the diaphragm cause it to vibrate. One of the magnets is a permanent magnet that constantly holds the diaphragm close to it. The other magnet is an electromagnet. It consists of a piece of iron with a coil of wire wound around it. When an electric current passes through the coil, the iron core becomes magnetized. The diaphragm is pulled toward the iron core and away from the permanent magnet. The pull of the electromagnet varies between strong and weak, depending on the variations in the current. Thus, the electromagnet controls the vibrations of the diaphragm in the receiver.The electric current passing through the electromagnet becomes stronger or weaker according to the loud or soft sounds. This action causes the diaphragm to vibrate according to the speakers speech pattern. As the diaphragm moves in and out, it pulls and pushes the air in front of it. The pressure on the air sets up sound waves that are the same as the ones sent into the transmitter. The sound waves strike the ear of the listener and he hears the words of the speaker. (www.howstuffworks.com) 2.6 THE RINGER Simply speaking this is a device that alerts you to an incoming call. It may be a bell, light, or warbling tone.  Ã‚   The ringing signal is in an AC wave form.   Although the common frequency used can be any frequency between 15 and 68 Hz.   Most of the world uses frequencies   between   20 and 40 Hz.  Ã‚   The voltage at the subscribers end depends upon loop length and number   of   ringers attached to the line; it could be between 40 and 150 Volts. The ringing cadence (the timing of ringing to pause), varies from company to company.   In the United States the cadence is normally 2 seconds of ringing to 4 seconds of pause. An unanswered phone in the United States will keep ringing until the caller hangs up.   But in some countries, the ringing will time out if the call is not answered. The   most   common   ringing   device is   the   gong   ringer; a solenoid   coil   with a clapper that strikes either a single or double bell. A gong ringer is the loudest signaling device that is solely phone-line powered. Modern telephones tend to use warbling ringers, which are usually ICs powered by the rectified ringing signal.   The audio transducer is a small   loudspeaker via a transformer. Ringers are isolated from the DC of the phone line by a capacitor. Gong ringers in the United States use a 0.47 uF capacitor.   Warbling ringers in the United States generally use a 1.0 uF capacitor.   Telephone companies in other   parts   of   the world   use   capacitors   between   0.2   and   2.0   uF.  Ã‚   The  Ã‚   paper capacitors of the past have been replaced almost exclusively with capacitors made of Mylar film.   Their voltage rating is always 50 Volts.   The capacitor and ringer coil, or Zeners in a warbling ringer, constitute a resonant circuit. When phone is hung up (on hook) the ringer is across the line; and it has merely silenced the transducer, not removed the circuit from the line. When the telephone company uses the ringer to test the line, it   sends   a   low-voltage, low frequency   signal   down   the   line (usually   2 Volts at 10 Hz) to test for continuity. The company compares result with the expected signals of the line.   This is how it can tell whether an added equipment is on the line. If your telephone has had its ringer disconnected, the telephone company cannot detect its presen ce on the line. Because there is only a certain amount of current available to   drive ringers, if ringers are added to phone lines indiscriminately, a point will be reached at which either all ringers will cease to ring, some will cease to ring, or some ringers will ring   weakly. A normal ringer is defined as   a   standard gong   ringer   as   supplied   in   a   phone   company   standard   desk telephone; Value given to this ringer   is   Ringer   Equivalence Number   (REN)   1. It can be as high as 3.2, which means that device consumes the equivalent   power   of   3.2 standard ringers, or 0.0, which means it consumes no current when subjected   to   a   ringing   signal.   If   there is a problem with ringing, it could be that the REN is greater than 5, disconnecting ringers until REN is at 5 or below will usually solve the problem. Other countries have various ways of expressing   REN,   and some   systems   will handle no more th an three of   their   standard ringers.   But whatever the system, if an extra equipment was added and the   phones   stop ringing, or the phone answering   machine   wont pick   up   calls,   the solution is disconnect   ringers   until   the problem   is resolved. Warbling ringers tend to draw less current than   gong   ringers, so changing from gong   ringers   to   warbling ringers may help spread the sound better. Frequency response is the second criterion by which a ringer is described. Because a ringer is supposed to respond to AC waveforms,   it will tend to respond to transients (such as switching transients) when the phone is hung up, or when the rotary dial is used on   an extension phone.   This is called bell tap in the United States; in other   countries,   its often called   bell   tinkle.  Ã‚   While European and   Asian phones tend to bell tap, or   tinkle,   United States ringers that bell tap are considered defective. The bell tap   is   designed out of gong ringers and fine   tuned   with   bias springs.  Ã‚   Warbling   ringers   for use in the   United   States   are designed   not   to respond to short transients;   this   is   usually accomplished   by   rectifying the AC and filtering   it   before   it powers the IC,   then not switching on the output stage unless the voltage lasts long enough to charge a second capacitor.(Roberts, 2006) 2.7 HOOK SWITCH This is a lever that is depressed when the handset is resting in its cradle. It is a two-wire to four-wire converter that provides conversion between the four-wire handset and the two-wire local loop. There are two stages, which are off   hook and on hook Off hook: The state of a telephone line that allows dialing and transmission but prohibits incoming calls from being answered. The phone is off-hook when the handset is removed from the base unit of a stationary phone or press Talk on a portable phone. The term stems from the days when the handset was lifted off an actual hook. When the handset was removed, a spring caused contacts to press together, closing the circuit from the telephone to the switchboard. On hook: The condition that exists when a telephone or other user instrument is not in use, i.e., when idle waiting for a call. Note: on-hook originally referred to the storage of an idle telephone reciever, i.e., separate earpiec, on a swithch hook. The weigth of the recieved depresses the sping leaded switch hook thereby disconnecting the idle instrument (except its bell) from the telephone line.  Ã‚  Ã‚  Ã‚   (Roberts, 2006) 2.8 THE DIAL There are two types of dials in use around the world. The most common one is called pulse, loop disconnect, or rotary; the oldest form of dialing, its been in use since the 1920s. The other dialing   method,   is called Touch-tone, Dual Tone Multi-Frequency   (DTMF) Pulse dialing   is traditionally accomplished with   a   rotary dial,   which is a speed governed wheel with a cam that opens   and closes a switch in series with the phone and the line.   It works by   actually   disconnecting   or hanging   up   the   telephone   at specific intervals.   The United States standard is one disconnect per  Ã‚   digit,  Ã‚   so if a   1, is dailled, the telephone   is disconnected once. To dial a seven means that it will be   disconnected seven times; and dialling a zero means that it will hang up ten times. Some countries invert the system so 1 causes ten disconnects   and 0,   one disconnect.   Some add a digit so that dialing a 5 would cause six disconnects and 0, eleven disconnects.   There are even some systems in which dialing 0 results in one   disconnect,   and all   other digits are plus one, making a 5 cause six   disconnects and 9, ten disconnects. Although most exchanges are quite happy with rates of 6   to 15   Pulses Per Second (PPS), the phone company accepted   standard is   8   to   10 PPS.   Some modern digital exchanges, free   of   the mechanical   inertia problems of older systems, will accept a   PPS rate as high as 20. Besides   the PPS rate, the dialing pulses have a   make/break ratio,   usually   described as a percentage, but   sometimes   as   a straight   ratio.   The North American standard is 60/40   percent; most of Europe accepts a standard of 63/37 percent.   This is the pulse measured at the telephone, not at the exchange, where   its somewhat   different, having traveled through the phone line   with its   distributed   resistance, capacitance,   and   inductance.  Ã‚   In practice, the   make/break   ratio does not   seem   to   affect   the performance of the dial when attached to a normal loop.   However,each pulse is a switch connect and disconnect across   a complex   impedance, so the switching transient often reaches   300 Volts. Usually, a safe practice is not to have fingers   across   the   line   when dialing. Most pulse dialing phones produced today use a CMOS IC and a keyboard.   Instead of pushing finger round in circles, then removing finger and waiting for the dial to return   before dialing the next digit, the button can be punched as fast as desired.   The IC stores the number and pulses out the number at the correct rate with the correct make/break ratio and the switching is done with a high-voltage switching transistor.   Because the IC has already stored the dialed number in order to pulse it out at the   correct rate,   its a simple matter for telephone designers to   keep   the memory alive   and allow the telephone to   store,   recall,   and redial the Last Number Dialed (LND).   This feature enables easy redial by picking up the handset and pushing just one button. Touch tone is the most modern form of dialing. It is   fast   and less   prone to error than pulse dialing.   Compared to pulse, its major advantage is that its audio band signals can   travel   down phone   lines further than pulse, which can travel only as far   as the   local   exchange. Touch-tone can therefore   send   signals around   the   world via the telephone lines, and can   be   used   to control phone answering machines and computers.   Bell   Labs developed DTMF in order to have a dialing   system that   could travel across microwave links and work   rapidly   with computer   controlled exchanges.   Each transmitted digit consists of two separate audio tones that are mixed together. The four   vertical columns on the keypad are known as   the   high group and the four horizontal rows as the low group; the digit   8 is   composed   of 1336 Hz and 852 Hz.   The level of each   tone   is within   3   dB   of the other.   A complete touch-tone pad has 16 digits, as opposed to ten on a pulse dial.   Besides the numerals 0 to 9, a DTMF   dial has *, #, A, B, C, and D.   Although the letters are not normally found   on consumer telephones, the IC in the phone is capable   of generating them. The   * sign is usually called star or asterisk.  Ã‚   The # sign,   often referred to as the pound sign. is actually   called an   octothorpe. Although many phone users have never used   these digits      they are not, after all, ordinarily   used in   dialing phone   numbers. They   are used   for   control   purposes,   phone answering machines, bringing up remote bases, electronic banking, and repeater control.   The one use of the octothorpe that may be familiar occurs in dialing international calls from phones.   After dialing the complete number,   dialing   the octothorpe   lets the exchange know youve finished   dialing.  Ã‚   It can now begin routing your call; without the octothorpe, it would wait and time out before switching your call. Standard DTMF dials will produce a tone as long as a key   is depressed.  Ã‚   No matter   how long you press,   the   tone   will   be decoded as the appropriate digit.   The shortest duration in which a digit can be sent and decoded is about 100 milliseconds   (ms).   Its pretty   difficult   to dial by hand at   such   a   speed,   but automatic dialers can do it.   A twelve-digit long distance number can be   dialed by an automatic dialer in a little   more   than   a second about as long as it takes a pulse dial to send a   single 0 digit.(Roberts,2006) 2.9 MODULAR CONNECTORS Modular connector is the name given to a family of electrical connectors that were originally used in telephone wiring. Even though they are still used for that purpose they are used for a variety of other things as well. A modular connectors advantage over many other kinds include; small size and ease of plugging and unplugging. Many uses that originally used a bulkier connector have migrated to modular connectors. Probably the most well known applications of modular connectors is for telephone jacks and for ethernet jacks, which are nearly always modular connectors. Figure 2.2 shows types of connectors commonly used. Modular connectors were first used in the registered jack system, so registered Jack specifications describe them precisely. These are the specifications to which all practical modular connectors are built. Modular connectors come in four sizes: 4-, 6-, 8-, and 10-position. A position is a place that can hold a conductor (pin). The positions need not all be used; a connector can have any even number of conductors. Unused positions are usually the outermost positions. The connectors are designed so that a plug can fit into any jack that has at least the number of positions as the plug. Where the jack has more positions than the plug, the outermost positions are unused. However, plugs from different manufacturers may not have this compatibility, and some manufacturers of eight position j

Examine the importance of Act III, Scene V Essay

Examine the importance of Act III, Scene V. How would you direct the scene in order to emphasise your interpretation? Romeo and Juliet is a play of love and tragedy. It is a great play if directed properly and is easy for people to understand. This is why I am writing this essay on how I would direct one of the most important scenes, Act III, Scene V. I will explain the significance of this scene and how I would get across its meaning. To understand this scene you need to know a little about life of people in the 16th Century; for one thing the relationship between children and their parents was very different especially amongst the rich. The father of the family expected everyone to do what he said even if they disagreed. Also mothers didn’t usually know their children personally as they hired nurses to take care of them 24/7 and even with babies they hired a wet-nurse, which means the nurse had usually just had a child and would breast feed the family’s child. The mother and father had very little to do with their children. Even though they didn’t know their children they still arranged their marriages! The children had no say in the matter. A rich family would usually set up a marriage with another wealthy family. It was socially unacceptable for a rich person to marry a poor person. Once married the wife was expected to do whatever her husband said and never answer back. If she did the husband would usually get angry and sometimes physical. As well as thinking about the 16th Century behaviour I need to think about the relevance to a modern audience. I think a modern audience would relate to all the love and compassion in this scene. They would see the love Juliet has for Romeo and feel sorry for her because her father is forcing her to marry someone else. They will see the pain and suffering she is going through to get her father to cancel the wedding but he gets angry because they should do what he says and never answer back. The important thing when trying to direct the scene is to emphasise the part the modern audience would relate to. I would do this by making the scene very dramatic and make the actor playing Capulet push Juliet around as well as speaking very loudly, maybe even shouting. I would also have the actress playing Juliet cry and whimper, get down on her knees and make it look like she is begging. The other characters, Lady Capulet and the Nurse would be trying to hold back Capulet, but would cower away when he speaks to them. This should show the audience that Juliet is desperate and will demonstrate how aggressive Capulet can be. As well as thinking about the historical context and the contemporary relevance we need to consider the character development. In this scene we find things out about the Capulet family we never knew before. The characters seem to change, for example Juliet starts the scene very happy as she has just that night consummated her marriage to Romeo. This happiness is shown when she says, â€Å"Nightly she sings on yon pomegranate tree. Believe me love it was the nightingale. † This shows that she is happy and being romantic. As the scene continues she changes from being happy to suicidal because she is being forced to marry Parris. â€Å"If all else fail, myself have power to die. † This means if she cannot delay the marriage she will kill herself. Another character that changes is the Nurse, as in the beginning of the scene she helps Juliet hide Romeo when Lady Capulet walked in. She said, â€Å"Your lady mother is coming to your chamber. † This shows the nurse wants to help and gives Romeo time to escape through the window. The Nurse does try and stick up for Juliet against Capulet but backs down when he shouts at her. Right at the end of the scene the Nurse suddenly changes and says, â€Å"I think it best you married with the county. † The Nurse has now decided not to back Romeo and Juliet’s love and told Juliet to marry Parris and forget about Romeo. She does this because she realises that Juliet has no alternative. We also learn things about the characters. We learn that Capulet has a very short fuse and gets very angry as he expects his family to do whatever he says. He was outraged that Juliet answered back by saying she did not want to marry Parris. â€Å"Hang thee young baggage, disobedient wretch! † This proves how aggressive Capulet gets. Also, Capulet and Lady Capulet’s marriage is shown in a different light as we see that Lady Capulet doesn’t stand up against her husband and does what he says. â€Å"Here comes your father, tell him so yourself, and see how he will take it at your hands. † This illustrates that she will not speak against her husband and advises Juliet to tell him herself. All this is showing that Capulet runs the relationship. We also find out that Romeo and Juliet’s relationship is very immature as they keep changing their minds about important things, for example â€Å"Therefore stay get, thou need’st not to be gone. † This proves their immaturity and that they don’t understand the consequences of their actions. This scene is a turning point in the play as Juliet is distraught because she is being forced to marry Parris and feels everyone has abandoned her. She believes the only way out is to take her own life, so she turns to the Friar for help. This is significant because the Friar is the one who gives her the sleeping potion and tells her to take it the night before her marriage to Parris. Taking the sleeping potion eventually leads to the death of Romeo and Juliet. I think the end isn’t quite inevitable because you don’t know that Romeo wouldn’t get the message from Friar Lawrence and think that Juliet is dead, then take the poison when he sees her in the tomb. If everything went to plan, Romeo would have known she was just in a deep sleep and then live together outside the walls of Verona. However, the way this scene ends and some of the language in this scene makes a tragic end more likely. There is a lot said in this scene that would suggest the play would end in tragedy. As Juliet is told she will marry Parris, this complicates everything for Juliet as she already has a husband. It makes her feel suicidal because Romeo has been banished and now she has to marry Parris. On top of all that her mother and Nurse abandon her. â€Å"Talk not to me, for I’ll not speak a word. Do as though wilt, for I have done with thee. † This makes us believe something tragic will happen soon. We also believe that it will end in tragedy because of the way the play has been structured. The play starts with the prologue, which says, â€Å"The fearful passage of their death marked love†¦ † This states that it will end tragically. Juliet says, â€Å"Methinks I see thee now though art so low, as one dead in the bottom of a tomb. † The two lovers separate after saying things like this, which suggests they will never see each other again. This all points to the same thing, a tragic end. This also changes the tone of the play because in the scene before, the mood was very loving and happy as Romeo and Juliet got married. This mood stayed at the beginning of this scene. â€Å"Look love, what envious streaks do lace the severing clouds I yonder east. † This shows Romeo being romantic to the women he loves. The romance is also shown in the structure of the sentences by iambic pentameter. It makes the sentences flow and sound poetic. All this shows love and happiness. Then when Juliet’s mother enters the mood changes from happy and loving to despair and sorrow. Juliet’s starts to plead with her mother but she will not listen. When her father enters the mood becomes very dramatic, as Capulet was being very aggressive. This is shown by harsh, brutal language, â€Å"Or I will drag thee on a hurdle thither. Out you green – sickness carrion. † This shows his anger and aggression. The rhythm has also changed, it is now very sharp and snappy to show the anger he has towards her. We also see Juliet pleading to her father, â€Å"Good father, I beseech you on my knees, hear me with patience, but to speak a word. † She pleads and pleads. She is worried and full of despair. At the end she talks of killing herself, this is how much the mood has changed. Shakespeare has presented several forms of love in this scene and other themes, like fate. The forms of love presented in this scene are young love, which Romeo and Juliet have for each other. This kind of love has blinded them and all they think about is each other. They don’t think about their actions. Also we are shown the love between Juliet and the Nurse, which is like a mother and daughter love. The Nurse helps Juliet and tries to give the best advice she can. I think Shakespeare wants the audience to conclude that love is strong and that people should fight for love. He may also want them to realise how some families can disown their children just because they love, in their eyes, the wrong person. The other theme, fate is an important part, as if it was meant to be they would be fine and nothing would go wrong but things go terribly wrong for Romeo and Juliet. So it seems fate is against them or fate has already predetermined their deaths. If I was directing the production of Romeo and Juliet I would instruct the actors to play their parts dramatically and over state things of importance e. g. I would make the actors playing Romeo and Juliet be over affectionate to each other at the beginning of this scene. I would tell the audience about the 16th Century life and behaviour, so they would be able to understand the background better. I would explain that the father expected everyone to do what he said. Also I would explain about the wet-nurse and the bond between her and Juliet. I would do this by including it in the programme or through a narrator. In order to get a good response from the audience I would have to highlight the things they can relate to. I would ask the actress who played Juliet to emphasise her despair by getting on her knees to plead with her father. Also I would make Capulet shout and push Juliet around ensuring that the audience would feel sorry for her. This will demonstrate how angry Capulet gets and that Juliet is really upset because she doesn’t want to marry Parris. To make sure they know the mother won’t stick up for Juliet I would make the actress hide behind Capulet. For the Nurse, I would get her to stop Capulet from hitting Juliet, to show she tried to help, but he will push her away. I would also make them emphasise the parts, which indicate the play will end in tragedy by speaking louder. Act III, Scene V is a particularly important scene because the mood drastically changes from happiness to despair. This is because she is being forced to marry Parris and everyone abandons her. All this shows the audience that there is going to be a tragic end to the play.

The Statue of David by Michelangelo-A Masterpiece

The Renaissance was a European phenomenon in the world of art and letters, which was found operative at the beginning of the 16th century all over Europe. It was a sort of the revival of learning-a New Learning-and a renewed interest in art and letters. It had a venerable attachment to the golden literary and artistic past of classical antiquity and an enthusiastic fondness for creative, imaginative and emotive freshness. It had a tremendous impact on the European mind and quickened its liberation from medieval dogmatism and feudal tyranny.The Renaissance brought bout the liberation of human thoughts and feelings and opened a wide vista of emotional freedom, imaginative flights and philosophical speculations in the sphere of art and literature. The statue of David, made by Michelangelo between 1501 and 1504, is a masterpiece of the Renaissance art. It is a seventeen feet tall sculpture of the biblical hero David, which was a favored subject in the art of Florence. In 1501, Florence h ad Just become independent from the Medici rule.This statue was commissioned by the Florentine council to be a gigantic model of heroic youth which could seem to protect Florence from the aggressors. The statue of David was one of the first structures of the male nude. The statue of David was built out of a block of smooth marble purchased from the famous quarries in Cascara. It was initially commissioned to Stagnation did Disco in 1466. He did not manage to work too much on it, and the contract was later terminated.Ten years after this, Antonio Reselling started working on it, but the contract was terminated again as no real progress was being made. The block thus lay exposed to the elements for twenty years before Michelangelo started working on it. Although he was not very happy at having to work on a block of second-hand marble, the contract with the Guild of Wool Merchants of Florence mentioned that the block intended was â€Å"badly roughened out†, stating that the bloc k was too valuable a commodity to waste. The statue was intended to be placed on the top of the Florence Cathedral.However, when it was finished, the beauty of the sculpture and its weight ruled out placing it at the top of the cathedral. It was too heavy to be lifted, and it was considered that people should have closer access to such a marvelous work of art. It was finally placed in the Piazza Della Signora outside the Palazzo Vehicle. Unlike the earlier sculptures of David by Overreach and Denotable, which showed David standing triumphant over the head of Goliath, the giant he had Just slain, Michelangelo portrays David with a slingshot and stone.He appears tense more in a mental than a physical sense, but not alarmed, and seems prepared for battle. His sling is small and not too emphasized, showing that the victory was not so much due to physical prowess as due to faith in oneself and desire to do the right thing. Michelangelo has depicted David at the moment when he showed the most courage-when he took up the challenge to fight Goliath. This decision was a crucial one, and reflected much more of his character than the moment when he finally killed Goliath.Michelangelo shows David not as the victor, but at the point in time when he prefigured victory-the moment between conscious choice and conscious action, when he made the choice to fight Goliath to protect his people, even though he had no armor and got ready with Just a slingshot and five smooth stones. For the people of Florence, for whom freedom had been newly found ND was under threat, the statue seemed to reflect the courage and determination of the brave who are determined to keep their city safe. The figure is menacing, but this is not fuelled by aggression. There is no tension in the arms or legs.The statue is of a young but mature man with the knotted muscles of an athlete, a huge rib cage and a confident stance. It seems to be keeping watch over the city. A million visitors gather till today to see this awe-inspiring piece of work, but it was originally built with the political message of David ready to take on Goliath, symbolizing that the people of Florence were ready to face any challenge to keep their freedom. The statue's warning eyes were turned towards Rome, hoping to keep invaders at bay. The statue provides almost life-like details of the human body even though human anatomy was forbidden during this time.Michelangelo was constrained by the second-hand marble he was using, but managed to carve a slim youth with a muscular built. Hush knowledge of the human form has recorded perfectly the shepherd lad with the strap of the slingshot across his back. However, on viewing the statue closely, it appears that the upper body is larger in proportion to the lower body. However, as Lois Fischer-Rather says in her book Understanding Art, â€Å"No longer does the figure remain still in a Classical contractors stance, but rather extends into the surrounding space away from a vertical axis.This movement outward from a central core forces the viewer to take into account both the form and the space between and surrounding the forms?in order to appreciate the complete composition. † The hands also appear to be large in proportion to the body. The disproportion could probably have been due to the fact that Michelangelo had carved the statue keeping in mind hat it was to be kept on the top of a cathedral. It could also be that the hands were purposely made too large to depict that man is naturally a violent and greedy creature.When one walks around the statue of David, he would find the appearance changing dramatically. The right hand side of the statue appears calm and composed, but the left hand side is dramatically different. It is dynamic and active, as is evident from the posture of the stretched leg all the way to the disheveled hair. It could be that Michelangelo made the body parts disproportionate to achieve this effect. The eyes too vary grea tly. From any given position, only one of his eyes are visible at one time.When one approaches the statue from the left, the left eye appears to be staring at a point behind and above the viewer, as if focusing on Goliath. From this position, the right eye appears to be hidden behind the sling and is hence not visible. On approaching from the right side, the right eye is visible while the left eye disappears. David would have thrown the stone towards his left, hence the left eye moves in the direction of the body intended move. The right eye, when embodied with the rest of the body, reflects power, cunning and intelligence.The statue of David was moved from Piazza Della Signora to Galleria dialectical in 1873 to protect it from decay and keep it safe. A replica of the original was placed in Piazza Della Signora. The Renaissance was the rebirth of man's life on earth, when he was free from the shackles of authority and free to understand the universe. Michelangelo David is the best e xpression of this sense of life. David appeals to us so much as it is Michelangelo projection of man at his very best-vigorous, healthy, dutiful, rational and competent form.It expresses a heroic view of man and a universal appeal to his success. Today, when man is again viewed by intellectuals as an ugly, corrupt being, trapped in an incomprehensible universe and lacking control over his own destiny, man is no longer viewed as a serious subject for art. But this magnificent sculpture of the bygone years instills in us a sense of faith, hope and glory, and above all leads us to believe again that one man can indeed make a difference, and man can control not only his destiny, but also that of his clan.

The Dangers of Prompt Dependence

The Dangers of Prompt Dependence Prompt dependence comes when a student needs a prompt in order to initiate a skill or activity. Often the skill is mastered, but prompting  is so much a part of the students expectations that they will not initiate and sometimes complete an activity without adult prompting.  Often this happens because the parent, therapist, teacher or teachers aide lays on the verbal prompting thick and consistently. Example Case of Prompt Dependency Rodney would sit and wait for Miss Eversham to tell him to start before he would begin the papers in his folder. Miss Eversham realized that Rodney had developed prompt dependency, relying on her giving verbal prompts for him to complete his folder. Dont Talk Too Much Prompting is an important part of scaffolding success with special education students, starting small and working toward more complex academic, functional or vocational skills. More often than not, children who become prompt dependent are those whose classroom aides are not always attentive to the fact that they give verbal prompts for everything. In other words, they talk too much. Too often, students get stuck on the continuum of prompts at the verbal prompt level and require the teacher to verbally direct them in order for them to complete the task or skill. Students can even be stuck at the hand over hand level some  students even need to take the teacher or aides hand and place it on their own hand before using scissors or even attempting to write with a writing utensil. Fading for Independence In each of the cases above, the problem was the failure to attend to the level of independence the child has developed and promptly fade out the prompts. If you start with hand over hand, as soon as you can loosen or relax your grasp, move toward the next level, moving your hand from the students hand to their wrist, to their elbow and then simply tapping the back of the hand. For other kinds of activities, especially for students have mastered the component parts of a larger skill (such as dressing) it is possible to begin with a higher level of prompting. It is important to avoid verbal prompting if possible.  Ã¢â‚¬â€¹Visual prompts are best, such as pictures of the student completing the activity, step by step. Once your student has clearly mastered the component parts, then employ gestural prompts alongside the verbal prompts, then withdraw or fade, the verbal prompts to finally leave only the gestural prompts, ending with independence. Independence should always be the goal of any educational program, and moving form prompting to independence is always the goal of an ethical and proactive teacher.   Be sure you are providing the kind of support that leads to independence.

Cent, Scent, and Sent - Commonly Confused Words

Cent, Scent, and Sent - Commonly Confused Words The words cent, scent, and sent  are  homophones: they sound alike but have different meanings. The noun cent refers to a coin equal to the hundredth part of a dollar: a penny. As both a noun and a verb, scent refers to an odor or the sense of smell. Sent is the past and past-participle form of the verb to send. Examples Texas oil was hardly worth a cent a barrel until Standard Oil discovered a way to refine it.​No man can taste the fruits of autumn while he is delighting his scent with the flowers of spring. (Samuel Johnson)​After two weeks in the hospital, the patient was sent home. Practice Exercises (a) I _____ my aunt a thank-you note and some flowers.(b) I paid my daughter one _____ for each dandelion she pulled out of the lawn.(c) The _____ of roses filled the cool morning air. Answers to Practice Exercises Answers to Practice Exercises:  Cent, Scent, and Sent (a) I  sent  my aunt a thank-you note and some flowers.(b) I paid my daughter one  cent  for each dandelion she pulled out of the lawn.(c) The  scent  of roses filled the cool morning air. Glossary of Usage: Index of Commonly Confused Words

Managing the Hospitality Experience Essay Example | Topics and Well Written Essays - 2000 words

Managing the Hospitality Experience - Essay Example This is achieved through an effort to entertain guests (Jones 2002). According to Jones (2002), hospitality should be an experience rather than a service. Guests’ experiences should be attractive to both their families and friends. Guests are craving for authentic local experiences that will establish an emotional connection (Hemming ton 2007). An excellent example is the Andaz5th Avenue Hotel. According to the general manager of Andaz5th Avenue Hotel, the experiences include fashion, events and food. According to USA today valuable and rare experiences are significant driving factors in the hospitality sector. 31 per cent of customers said destination hotels are perceived to be a hidden gem. 26 per cent of the interviewed customers said they loved to share photos of the hotels they stayed. Creating the elusive guest experiences to different customers is achievable but demanding. The expectations of guests are divergent and differ with times and seasons. Another compelling exa mple is the Renaissance Hotel. Renaissance hotel brand has introduced an ad targeting both leisure and business travelers. The brand insists that business guests who insist on free Wi-Fi and breakfast must have an experience, as well. Dan Vinh, Renaissance vice president, said the hotel hopes to offer a unique experience. He believes guests are stimulated by the environment in order to be productive. Q2. According to Visser, hospitality entails sharing of security, food and shelter with a stranger within the community who has no friend or relatives. The act of providing and receiving generosity creates mutual trust. According to Doud, generosity is a gracious act. He argues that, the use of the word stranger in the definition of generosity tends to imply that the receiver of the generous act does not deserve it because they are not acquainted to each other. The word grace implies a respectful attitude given towards people who do not deserve or earn a worm consideration. Hospitality is also hereditary. Once an act of hospitality has been done to a person or household, the same is extended to the descendants and passed on from generation to generation. This establishes a long term bond (Kandampully & Sparks 2001). Bonds established through hospitality were supposed to be temporal. The agreed period was three days, and the guests were expected to reciprocate by not overstaying. Hospitality had territorial limitations. Protection was offered within the period of stay and the boundaries of territorial influence. For instance, Arabs only offered protection as long as the guest was in within their home. Beyond that, the guest could end up become a victim of the host. Therefore, the guests used to leave at night and without any farewell to the host for fear of being pursued by the host. According to Pitt-Rivers, hospitality was not necessarily a mark of friendship. Providing hospitality, according to Pitt-Rivers, was an act of sanctity where a hostile stranger and a h ost were neutral to each other. Hospitality was an act of self interest because certain gains were expected. According to Selwyn, hospitality gave way to a transformation where the aggrieved regained their trust and friendship in the course of exchange of services. Hospitality is known to transform friends into closer friends. Hospitality is an act of selfless will where acceptance and trust are propagated. This causes hospitality to be a source of symbolic ties that create unique connections between people.

Modern pricing models Essay Example | Topics and Well Written Essays - 500 words

Modern pricing models - Essay Example A geometric Brownian motion (GBM), or an exponential Brownian motion, refers to a stochastic process that runs continuously over time in which case the logarithm of the randomly varying quantity follows a Wiener process, or the Brownian motion with a drift. According to Vose (2008), the Brownian motion is a significant example of the stochastic processes that satisfy a stochastic differential equation (SDE). Most applications of Brownian motion incorporate, in particular, mathematical finance, especially in consideration of the model stock prices, such as is the case with Black-Scholes model. As such, the geometric Brownian motion is a core building block of modern finance. This is particularly in the case of the Black Scholes model whereby the underlying stock price is assumedly in line with the principles and expectations of the GBM dynamics (Vose 2008, p.37). When an investor wants to make an investment in the binary options, the most important element that he or she should account for is the fluctuation in the price that a particular commodity or good is likely to experience over a specific period of the trading process. As such, once an investor is able to track the volatility of the price changes with some degree of accuracy, they get to a better elevated position to determine the right the price of an option at the point when it expires, thereby increasing significantly his or her chances of being in the money at the right time. Therefore, such an investor will be in a better position to collect the highest level of return on his or her investment (Vose 2008, p.115). According to Benth (2004), it is quite fortunate that top economists conducted a great deal of research in the field of Wiener motion, such as Fischer Black and Myron Scholes who came up with the infamous Black-Scholes formula instrumental in predicting the market volatility of a stock. The geometric Brownian motion forms an important element of this formula, and